Please help me to solve the following problems I attached below: 4. CU Autos is offering free credit on a new $10,000 car. You pay $1,000 down (i.e. an initial deposit of $1,000) and then $300 a month for the next 30 months starting one month later. HK Motor does not offer free credit but will give you $1,000 off the list price. If the rate of interest is 10% a year, which company should you choose? 5. If the interest rate is 8%, what is the value of the following two investments? a. An investment that offers you $100 a year in perpetuity with the payment at the end of each year b. A similar investment with the payment at the beginning of each year. 6. You start your retirement planning by depositing $24,000 every year (starting one year from now) in an investment that expected to generate an annual return of 8%. How much would you expect to have at the end of 40 years (including the last deposit at the end of the 40th year)? 7. You plan to save S5million to support your retirement life which is expected to be 30 years. Assume interest rate is 4% and you start withdrawing money from your saving one year later after you have S5million, how much can you draw each year so that there will be nothing left in your saving after 30 years